Isotherm and kinetic studies on the adsorption of nitrate onto nanoalumina and iron-modified pumice

Golestanifar, H.; Asadi, Anvar; Alinezhad, Ali; Haybati, B.; Niri, Mehdi Vosoughi

doi:10.1080/19443994.2014.1003975

Cited by 45 publications

(18 citation statements)

References 42 publications

(41 reference statements)

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“…There was no significant change in nitrate uptake by nanoalumina after 20 min. Similarly, Golestanifar et al 34 investigated the nitrate adsorption efficiency using nanoalumina and observed the maximum adsorption efficiency of 70.8 mg/g within the contatct time of 50 min. Natural zeolite and natural zeolite-supported zerovalent iron nanoparticles showed maximum nitrate adsorption efficiency of 1.4 and 8.9 mg/g at an equilibrium contact time of about 12 and 7 h, respectively.…”

Section: Effect Of Contact Time and Initial Concentration On No3adsormentioning

confidence: 99%

Scavenging of nitrate ions from water using hybrid Al₂O₃/bio-TiO₂nanocomposite impregnated thermoplastic polyurethane nanofibrous membrane

et al. 2015

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In the present study, we have exploited the nitrate adsorption property of Al2O3/bio-TiO2 nanocomposite (ABN) and ABN impregnated electrospun thermoplastic polyurethane nanofibrous membrane (ABN/TPU-NFM) for water purification. Nitrate adsorption was investigated both in batch and dip mode studies. Parameters like effect of contact time, adsorbate concentration and membrane size were optimized. The adsorption capacity (Q0) of the ABN and ABN/TPU-NFM was found to be 30.3 and 14.9 mg/g, respectively. Kinetics of the adsorption process was studied using pseudo-first-order and second-order models and it was found to obey pseudo-second-order kinetic model. The phase identification, crystalline stability and the surface functional groups of the adsorbents involved in nitrate adsorption were characterized by X-ray diffraction (XRD) and Fourier transform infra-red (FTIR) spectroscopy. Leachability studies carried out using atomic absorption spectroscopy (AAS) indicated no leaching of impregnated nanoparticles from ABN/TPU-NFM in the treated water. No significant cytotoxicity for ABN was observed when tested with mouse fibroblast cells (L929), suggesting that the developed hybrid adsorbent is biocompatible and safe for drinking water purification. Further, field trial was carried out using natural ground water sample collected from nitrate contaminant area and tested for nitrate removal by dip mode adsorption process using ABN/TPU-NFM. The treated water was found to be potable having permissible limit of nitrate. This facile approach of designing nanocomposite impregnated nanofiber membrane is efficient in removing nitrate from contaminated drinking water. Fig. 3 Effect of adsorbent dosage using ABN (a) and varying membrane size of ABN/TPU-NFM (b) in the removal of nitrate

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Section: Effect Of Contact Time and Initial Concentration On No3adsormentioning

confidence: 99%

Scavenging of nitrate ions from water using hybrid Al₂O₃/bio-TiO₂nanocomposite impregnated thermoplastic polyurethane nanofibrous membrane

et al. 2015

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“…The main substrate for feeding the SBR was included methanol, TBA and MTBE along with nutrients (nitrogen and phosphorus). Gas Chromatograph (Agilent model) was used for measuring the MTBE [6] , [7] , [8] . Low levels of essential elements (micro elements) were injected to SBR during application.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Efficiency of sequencing batch reactor for removal of organic matter in the effluent of petroleum wastewater

et al. 2018

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The main aim of this research was to study the biodegradation of Methyl Tertiary Butyl Ether (MTBE) using aerobic sequencing batch reactor (SBR) at a pilot-Scale. The reactor was made of a 3 mm-thick glass cylinder with an internal diameter of 12 cm and height of 60 cm. SBR operated in five phases. The first phase was filling the reactor for about 10 min. the second phase was the main reactor for biological treatment of petroleum wastewater about 21.55 h. The third phase was the sedimentation (1 h). The fourth phase was decanting from the reactor for about 10 min. The last phase consisted of idle for about 45 min. The experiments showed that the mixed microbial mass is able to degrade high concentration of methanol up to 250 mg/l, and concentration of MTBE up to 70 mg/l for a 24 h cycle. However, the mixed microbial mass is not able to degrade MTBE with concentration more than 70 mg/l. Microorganisms were generally isolated from Fajr petrochemical wastewater treatment plant. Analysis showed that the mixed microbial mass able to biodegradation of COD up to 1350 mg/l in effluent. Aerobic SBR can be used for biological treatment of the petroleum wastewater containing pollutants such as methanol, MTBE with a promising efficiency.

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“…The extractives of cork include several organic compounds such as waxes, triterpenes, fatty acids, glycerides, phenols and polyphenols. The pH influences the chemical speciation and the diffusion rate of solutes, the dissociation of sorbent functional groups and the sorbent surface charge (Rahmani et al, 2010;Glestanifar et al, 2016). It is assumed that the PS affects the release of organic carbon, since it is directly related to surface area, although this effect might vary according to the initial wastewater pH.…”

Section: Effect Of Ps and Ph On The Release Of Organic Carbonmentioning

confidence: 99%

Cork as a sustainable carbon source for nature-based solutions treating hydroponic wastewaters – Preliminary batch studies

Castellar

Formosa

Fernández

et al. 2019

Science of The Total Environment

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Reusing by-products is an important strategy to ensure the preservation of natural capital and climate change mitigation. This study aimed at evaluating the potential of cork granulates, a by-product of winery industry, as an organic carbon (OC) source for the treatment of hydroponic wastewaters. First, chemical characterization was performed and discussed. Secondly, batch studies were performed using synthetic hydroponic wastewater to understand the role of particle size (PS), pH and contact time (CT) on the release of OC. The suberin is the major compound, representing >50%. It was noticed that a variance on the content of suberin across species, within the same species and depending on the extraction part (belly, cork and back) could be expected. >60% of the sample is composed by carbon while <1% was nitrogen (high C:N ratio), indicating a low risk of releasing organic nitrogen. The statistical results suggested that the main effect of PS on the release of OC is greater than both, CT and pH. The chemical release of OC gets slower with time, being this effect greater as the PS increase. Moreover, estimations showed that using the 4 mm PS, the amount of water treated would be twice the amount if the 8 mm PS had been used. The PS seems to play an important role at design nature-based solutions (NBS) focused on denitrification. The surface response methodology indicates a significant negative interaction between CT and PS suggesting that the mathematical model could be used for further optimization studies. The reuse of organic by-products as filter media seems to be an economic and environmentally friendly alternative to enhance denitrification in NBS, while preserving natural capital. However, further real scale and long-term experiments are needed to validate cork's potential as an "internal" OC source for NBS.

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Isotherm and kinetic studies on the adsorption of nitrate onto nanoalumina and iron-modified pumice

Cited by 45 publications

References 42 publications

Scavenging of nitrate ions from water using hybrid Al₂O₃/bio-TiO₂nanocomposite impregnated thermoplastic polyurethane nanofibrous membrane

Scavenging of nitrate ions from water using hybrid Al₂O₃/bio-TiO₂nanocomposite impregnated thermoplastic polyurethane nanofibrous membrane

Efficiency of sequencing batch reactor for removal of organic matter in the effluent of petroleum wastewater

Cork as a sustainable carbon source for nature-based solutions treating hydroponic wastewaters – Preliminary batch studies

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Isotherm and kinetic studies on the adsorption of nitrate onto nanoalumina and iron-modified pumice

Cited by 45 publications

References 42 publications

Scavenging of nitrate ions from water using hybrid Al2O3/bio-TiO2nanocomposite impregnated thermoplastic polyurethane nanofibrous membrane

Scavenging of nitrate ions from water using hybrid Al2O3/bio-TiO2nanocomposite impregnated thermoplastic polyurethane nanofibrous membrane

Efficiency of sequencing batch reactor for removal of organic matter in the effluent of petroleum wastewater

Cork as a sustainable carbon source for nature-based solutions treating hydroponic wastewaters – Preliminary batch studies

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Scavenging of nitrate ions from water using hybrid Al₂O₃/bio-TiO₂nanocomposite impregnated thermoplastic polyurethane nanofibrous membrane

Scavenging of nitrate ions from water using hybrid Al₂O₃/bio-TiO₂nanocomposite impregnated thermoplastic polyurethane nanofibrous membrane